Current collecting plate, battery and electric equipment

Abstract

The utility model provides a collector plate, a battery and electric equipment. The flow collecting disc comprises a flow collecting disc body and a turnover piece, a through hole is formed in the flow collecting disc body, the turnover piece is arranged at the through hole, the turnover piece comprises a flow collecting part and a connecting part, the connecting part is connected with the flow collecting part and the flow collecting disc body, the partial thickness of the connecting part is smaller than the thickness of other parts of the connecting part, and / or the turnover piece is arranged on the flow collecting disc body. The thickness of at least part of the connecting part is smaller than that of the collector plate body, and / or the thickness of at least part of the connecting part is smaller than that of the collector part. According to the collector plate, the turnover piece is easier to turn over, the turnover angle of the turnover piece is guaranteed, and the unfolding effect of the collector plate is improved.

Description

Technical Field

[0001] This application relates to the field of battery technology, specifically to current collectors, batteries, and electrical equipment. Background Technology

[0002] Batteries are widely used in energy storage systems, transportation, and consumer electronics. Battery thermal runaway refers to the phenomenon where, during battery operation, the accelerated chemical reactions caused by increased internal temperature lead to a further rise in temperature, creating a self-reinforcing feedback loop that can ultimately result in overheating, smoke, combustion, or even explosion of the battery.

[0003] To prevent the thermal runaway from escalating, the current collector needs to deploy to release pressure when thermal runaway occurs. However, the deployment efficiency of the current collector in related technologies still needs improvement. Utility Model Content

[0004] The embodiments of this application provide a collector plate, a battery, and an electrical device, which can improve the technical problem that the deployment effect of the collector plate still needs to be improved.

[0005] In a first aspect, embodiments of this application provide a data collection disk, comprising:

[0006] The collector plate body has through holes;

[0007] A folding component is provided at the through hole. The folding component includes a current collecting part and a connecting part, and the connecting part connects the current collecting part and the current collecting disk body.

[0008] Wherein, a portion of the thickness of the connecting part is less than the thickness of other portions of the connecting part, and / or, at least a portion of the thickness of the connecting part is less than the thickness of the collector plate body, and / or, at least a portion of the thickness of the connecting part is less than the thickness of the collector part.

[0009] In one embodiment, the connecting portion includes a first metal connecting portion and a second metal connecting portion. The first metal connecting portion connects the second metal connecting portion and the collector plate body. The second metal connecting portion connects to the collector portion. The connection point between the first metal connecting portion and the second metal connecting portion is located at the position where the thickness of the connecting portion is the smallest.

[0010] In one embodiment, the first metal connection portion includes a first-stage connection portion and a second-stage connection portion, the first-stage connection portion connecting the second-stage connection portion and the collector disk body, and the second-stage connection portion connecting to the second metal connection portion;

[0011] The thickness of the second-level connection gradually decreases along the direction from the first-level connection to the second-level connection.

[0012] In one embodiment, the second metal connection portion includes a third secondary connection portion and a fourth secondary connection portion, the third secondary connection portion connecting the fourth secondary connection portion and the current collection portion, and the fourth secondary connection portion connecting the first metal connection portion;

[0013] In particular, along the direction from the third secondary connection portion to the fourth secondary connection portion, the thickness of the fourth secondary connection portion gradually decreases.

[0014] In one embodiment, there are multiple through holes and multiple folding elements, and the multiple through holes and multiple folding elements correspond one-to-one.

[0015] In one embodiment, the collector plate body includes an edge portion, a center portion, and a connector, the connector connecting the edge portion and the center portion, and a plurality of folding members arranged around the center portion.

[0016] In one embodiment, a plurality of the folding members are connected to the edge portion; and / or, a plurality of the folding members are connected to the center portion; and / or, different folding members are connected to different connectors.

[0017] In one embodiment, the thickness of a portion of the connector is less than the thickness of the other portions of the connector.

[0018] In one embodiment, the connector includes a first metal connecting segment and a second metal connecting segment, the first metal connecting segment connecting the second metal connecting segment and the edge portion, the second metal connecting segment connecting the center portion, and the connection point between the first metal connecting segment and the second metal connecting segment being located at the position where the thickness of the connector is minimum.

[0019] In one embodiment, the first metal connecting segment includes a first-level connecting segment and a second-level connecting segment, the first-level connecting segment connecting the second-level connecting segment and the edge portion, and the second-level connecting segment connecting the second metal connecting segment;

[0020] The thickness of the second-level connecting segment gradually decreases along the direction from the first-level connecting segment to the second-level connecting segment.

[0021] In one embodiment, the second metal connecting segment includes a third secondary connecting segment and a fourth secondary connecting segment, the third secondary connecting segment connecting the fourth secondary connecting segment and the central portion, and the fourth secondary connecting segment connecting the first metal connecting segment;

[0022] In particular, along the direction from the third-level connecting segment to the fourth-level connecting segment, the thickness of the fourth-level connecting segment gradually decreases.

[0023] In one embodiment, there are multiple connectors, which are evenly arranged around the central portion.

[0024] In one embodiment, the distance between the end of the first metal connecting segment facing away from the connection and the connection is L1, and the distance between the end of the second metal connecting segment facing away from the connection and the connection is L2, wherein...

[0025] L1 is less than L2; or,

[0026] The ratio of L1 to L2 is between 0.2 and 1.

[0027] In one embodiment, the maximum thickness of the connector is between 0.1 mm and 3 mm; and / or, the ratio of the thickness of the connection to the maximum thickness of the connector is less than or equal to 0.7.

[0028] In one embodiment, the central portion protrudes from the folding member.

[0029] In one embodiment, the first end of the second metal connecting segment is connected to the first metal connecting segment, the second end of the second metal connecting segment is connected to the center portion, and the second end of the second metal connecting segment protrudes away from the first metal connecting segment relative to the first end of the second metal connecting segment.

[0030] Secondly, embodiments of this application provide a battery including a housing, a winding core, and the aforementioned current collector. The housing has a mounting cavity, and both the winding core and the current collector are disposed within the mounting cavity. The current collector is connected to the winding core.

[0031] In one embodiment, the manifold body includes an edge portion, a center portion, and a connector, the connector connecting the edge portion and the center portion, and the center portion having an injection hole.

[0032] In one embodiment, the ratio of the area of ​​the injection hole to the cross-sectional area of ​​the core is less than 0.2.

[0033] In one embodiment, the diameter of the injection hole is D1, the diameter of the center is D2, the capacity of the battery is M, the fast charging capability of the battery is N, and the current carrying capacity of the current collector is I, wherein 1 / 4πD22 -1 / 4πD12>MN / I.

[0034] Thirdly, embodiments of this application provide an electrical device including the battery described above.

[0035] The beneficial effects of the embodiments of this application are as follows:

[0036] In the embodiments of this application, by setting the thickness of a portion of the connecting part to be less than the thickness of the other portions of the connecting part, that is, by thinning the thickness of a portion of the connecting part, the thinned portion of the connecting part is more likely to be bent, thereby making the folding part easier to fold, ensuring the folding angle of the folding part, and improving the unfolding effect of the collector plate.

[0037] By setting the thickness of at least a portion of the connecting part to be less than the thickness of the collector plate body, that is, by thinning the thickness of at least a portion of the connecting part, the connecting part with a thinner thickness is easier to bend, reducing the difficulty of folding the collector plate relative to the connecting part, thereby making it easier for the folding part to fold, ensuring the folding angle of the folding part, and improving the unfolding effect of the collector plate.

[0038] By setting the thickness of at least part of the connecting part to be less than the thickness of the collecting part, that is, by thinning the thickness of at least part of the connecting part, the connecting part with a thinner thickness is easier to bend, which reduces the difficulty of folding the collecting part relative to the connecting part, thereby making it easier for the folding part to fold, ensuring the folding angle of the folding part, and improving the unfolding effect of the collecting plate. Attached Figure Description

[0039] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0040] Figure 1 This is one of the structural schematic diagrams of the collector disk provided in the embodiments of this application;

[0041] Figure 2 This is a second schematic diagram of the structure of the collector disk provided in the embodiments of this application;

[0042] Figure 3 This is a cross-sectional view of the manifold provided in an embodiment of this application;

[0043] Figure 4 This is a schematic diagram of the structure of the connecting part provided in an embodiment of this application;

[0044] Figure 5 This is one of the structural schematic diagrams of the connector provided in the embodiments of this application;

[0045] Figure 6 This is a second schematic diagram of the structure of the connector provided in the embodiments of this application;

[0046] Figure 7 This is a schematic diagram of the structure of the collector plate provided in an embodiment of this application, wherein the central part is raised and the connecting part is not disconnected;

[0047] Figure 8 This is a schematic diagram of the structure of the collector disk provided in an embodiment of this application, wherein the connector is disconnected;

[0048] Figure 9 This is a schematic diagram of the structure of the collector plate provided in an embodiment of this application, wherein the connecting member is disconnected and the folding member is unfolded. Detailed Implementation

[0049] The technical solutions in the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. In addition, it should be understood that the specific embodiments described herein are only for illustration and explanation of this application and are not intended to limit this application. In this application, unless otherwise stated, directional terms such as "upper" and "lower" generally refer to the upper and lower positions of the device in actual use or operation, specifically the drawing directions in the accompanying drawings; while "inner" and "outer" refer to the outline of the device.

[0050] The following is combined Figures 1 to 9 This application describes the current collector, battery, and electrical equipment.

[0051] According to the embodiments of the first aspect of this application, see [link / reference]. Figure 1 , Figure 2 and Figure 3 The collector plate includes a collector plate body 1 and a folding member 2. The collector plate body 1 has a through hole 11. The folding member 2 is located at the through hole 11. The folding member 2 includes a collector part 21 and a connecting part 22. The connecting part 22 connects the collector part 21 and the collector plate body 1.

[0052] Wherein, the thickness of a portion of the connecting portion 22 is less than the thickness of the other portions of the connecting portion 22, and / or, at least a portion of the connecting portion 22 is less than the thickness of the collector plate body 1, and / or, at least a portion of the connecting portion 22 is less than the thickness of the collector portion 21.

[0053] According to the embodiment of this application, by setting a portion of the thickness of the connecting portion 22 to be less than the thickness of other portions of the connecting portion 22, that is, by thinning the thickness of a portion of the connecting portion 22, the thinned portion of the connecting portion 22 is more likely to be bent, thereby making the folding member 2 easier to fold, ensuring the folding angle of the folding member 2, and improving the unfolding effect of the collecting disk.

[0054] By setting the thickness of at least part of the connecting part 22 to be less than the thickness of the collector plate body 1, that is, by thinning the thickness of at least part of the connecting part 22, the connecting part 22 is easier to bend after the thickness is reduced, which reduces the difficulty of folding the collector part 21 relative to the connecting part 22, thereby making it easier for the folding part 2 to be folded, ensuring the folding angle of the folding part 2, and improving the unfolding effect of the collector plate.

[0055] By setting the thickness of at least part of the connecting portion 22 to be less than the thickness of the collecting portion 21, that is, by thinning the thickness of at least part of the connecting portion 22, the connecting portion 22 is easier to bend after the thickness is reduced, which reduces the difficulty of folding the collecting portion 21 relative to the connecting portion 22, thereby making it easier for the folding part 2 to be folded, ensuring the folding angle of the folding part 2, and improving the unfolding effect of the collecting plate.

[0056] It is understandable that the unfolding effect of the collector plate refers to the degree / angle of folding component 2. The greater the degree / angle of folding component 2, the better the unfolding effect of the collector plate.

[0057] The unfolding effect of the collector plate can also refer to its exhaust effect, or its exhaust area. The larger the folding angle of the folding part 2, the smaller the obstruction of the folding part to the gas passing through the collector plate, the larger the exhaust area of ​​the collector plate, and the better the exhaust effect.

[0058] Understandably, the current collector is connected to the battery core. When the battery experiences thermal runaway, high-temperature gas will flow to the current collector. The high-temperature gas will act on the folding member 2 through the through hole 11, causing the folding member 2 to fold and unfold the current collector so that the high-temperature gas can pass through the current collector and be discharged, thereby depressurizing the battery and ensuring its safety.

[0059] It is understandable that by reducing the thickness of the connecting part 22, when the battery is overcharged or overcurrented, the temperature rises and the thinned connecting part 22 will melt, causing the connection between the current collector 21 and the current collector body 1 to break, thereby achieving power-off protection and improving the safety of the battery.

[0060] When the battery experiences thermal runaway, the thinned connecting portion 22 will also melt. If only part of the connecting portion 22 is thinned, the difficulty of folding the current collector 21 will be reduced after the thinned connecting portion 22 melts, which is beneficial for the folding of the folding part 2. If all of the connecting portions 22 are thinned, the connecting portion 22 will melt directly, and under the action of the gas generated by thermal runaway, the current collector 21 will directly detach from the current collector disk body 1, which improves the unfolding effect of the folding part 2.

[0061] In some embodiments, see Figure 1 and Figure 4 The connecting part 22 includes a first metal connecting part 221 and a second metal connecting part 222. The first metal connecting part 221 connects the second metal connecting part 222 and the collector plate body 1. The second metal connecting part 222 connects to the collector part 21. The connection point of the first metal connecting part 221 and the second metal connecting part 222 is located at the position where the thickness of the connecting part 22 is the smallest.

[0062] Understandably, reducing the thickness at the connection between the first metal connecting part 221 and the second metal connecting part 222 reduces the difficulty of folding the second metal connecting part 222 relative to the first metal connecting part 221, making it easier for the folding part 2 to fold, ensuring the folding angle of the folding part 2, and improving the unfolding effect of the collector plate.

[0063] Understandably, setting the thickness of the connection between the first metal connector 221 and the second metal connector 222 to the minimum thickness of the connector 22 effectively reduces the difficulty of folding the second metal part relative to the first metal part, making it easier for the current collector 21 to fold. Simultaneously, it ensures that the connection between the first metal connector 221 and the second metal connector 222 can melt and break in the event of overcharging or overcurrent.

[0064] In some embodiments, see Figure 1 and Figure 4 The first metal connection part 221 includes a first stage connection part 2211 and a second stage connection part 2212. The first stage connection part 2211 connects the second stage connection part 2212 and the collector disk body 1. The second stage connection part 2212 connects to the second metal connection part 222.

[0065] In particular, along the direction from the first-stage connecting portion 2211 to the second-stage connecting portion 2212, the thickness of the second-stage connecting portion 2212 gradually decreases.

[0066] It is understandable that the thickness of the second-level connecting portion 2212 is set to gradually decrease, so that from the second-level connecting portion 2212 to the connection between the second-level connecting portion 2212 and the second metal connecting portion 222, the thickness of the connecting portion 22 gradually decreases, which facilitates the forming of the first metal connecting portion 221 and the connecting portion 22.

[0067] In some embodiments, see Figure 1 and Figure 4 The second metal connection 222 includes a third secondary connection 2221 and a fourth secondary connection 2222. The third secondary connection 2221 connects the fourth secondary connection 2222 and the current collector 21. The fourth secondary connection 2222 is connected to the first metal connection 221.

[0068] In particular, along the direction from the third secondary connection 2221 to the fourth secondary connection 2222, the thickness of the fourth secondary connection 2222 gradually decreases.

[0069] It is understandable that the thickness of the fourth secondary connection portion 2222 is set to gradually decrease, so that from the fourth secondary connection portion 2222 to the connection between the fourth secondary connection portion 2222 and the first metal connection portion 221, the thickness of the connection portion 22 gradually decreases, which facilitates the forming of the second metal connection portion 222 and the connection portion 22.

[0070] In some embodiments, there are multiple through holes 11 and multiple folding parts 2, and the multiple through holes 11 and multiple folding parts 2 correspond one-to-one.

[0071] Understandably, when the battery experiences thermal runaway, each folding component 2 will fold, ensuring the unfolding effect of the current collector.

[0072] In some embodiments, see Figure 1 and Figure 2 The collector plate body 1 includes an edge portion 12, a center portion 13 and a connector 14. The connector 14 connects the edge portion 12 and the center portion 13, and multiple folding parts 2 are arranged around the center portion 13.

[0073] Specifically, multiple folding pieces 2 are connected to the edge portion 12.

[0074] Understandably, when the battery experiences thermal runaway, the folding member 2 can fold relative to the edge portion 12 to unfold the current collector.

[0075] Specifically, multiple folding parts 2 are all connected to the central part 13.

[0076] Understandably, when the battery experiences thermal runaway, the folding member 2 can fold relative to the center part 13 to unfold the current collector.

[0077] Specifically, different folding parts 2 are connected to different connecting parts 14.

[0078] Understandably, when the battery experiences thermal runaway, the folding member 2 can fold relative to the connecting member 14, thereby unfolding the current collector. Simultaneously, since different folding members 2 are connected to different connecting members 14, mutual interference between different folding members 2 can be reduced, ensuring that all different folding members 2 can fold and unfold.

[0079] In some embodiments, see Figure 5 , Figure 6 and Figure 7 The thickness of a portion of the connector 14 is less than the thickness of the other portions of the connector 14.

[0080] It is understandable that by setting the thickness of a portion of the connector 14 to be less than the thickness of the other portions of the connector 14, the thickness of a portion of the connector 14 is reduced.

[0081] When a battery experiences thermal runaway, the gas generated during the runaway acts on the central portion, causing it to move away from the edge portion 12. This central portion pulls on the connector 14. Because the connection between the thinned and unthinned portions of the connector 14 is prone to deformation, the central portion can bulge under the influence of the gas. In other words, in the initial stage of thermal runaway, the central portion first pulls away from the battery core. At this time, the connector 14 deforms to allow the central portion to bulge smoothly. This means that the connector 14 does not immediately disconnect, thus maintaining electrical connection between the current collector and the core in the early stages of thermal runaway. This prevents the current collector from detaching directly from the core in the early stages of thermal runaway, which could damage the core's structure and prevent short circuits between the positive and negative terminals of the core, thus avoiding exacerbating the thermal runaway.

[0082] As thermal runaway progresses, see [reference] Figure 8 and Figure 9 After the thickness is reduced, the connecting part 14 will break off, allowing the central part to detach and enabling the distribution plate to unfold.

[0083] When the battery experiences overcharging or overcurrent, which can lead to excessively high temperatures, the thinned portion of the connector 14 will melt to provide power-off protection and improve battery safety.

[0084] In some embodiments, see Figure 5 and Figure 6 The connector 14 includes a first metal connecting segment 141 and a second metal connecting segment 142. The first metal connecting segment 141 connects the second metal connecting segment 142 and the edge portion 12. The second metal connecting segment 142 connects to the center portion 13. The connection point of the first metal connecting segment 141 and the second metal connecting segment 142 is located at the position where the thickness of the connector 14 is the smallest.

[0085] It is understandable that reducing the thickness at the connection between the first metal connecting section 141 and the second metal connecting section 142 reduces the difficulty of deformation of the second metal connecting part 222 relative to the first metal connecting part 221, thereby reducing the difficulty of the central part 13 protruding away from the battery core. This allows the central part 13 to pull away from the battery core in the early stage of thermal runaway, and the connector 14 will not be directly disconnected. This ensures that the current collector and the core remain electrically connected in the early stage of thermal runaway, preventing the current collector from directly separating from the core and causing damage to the core structure. It also prevents the positive and negative poles of the core from being short-circuited, which would exacerbate thermal runaway. The folding part 2 is easier to fold, ensuring the folding angle of the folding part 2 and improving the unfolding effect of the current collector.

[0086] Understandably, setting the thickness of the connection between the first metal connecting segment 141 and the second metal connecting segment 142 to the minimum thickness of the connector 14 effectively reduces the difficulty of deformation of the second metal part relative to the first metal part, making it easier for the central part 13 to bulge away from the winding core. Simultaneously, it ensures that the connection between the first metal connecting segment 221 and the second metal connecting segment 222 can melt and break in the event of overcharging or overcurrent.

[0087] In some embodiments, see Figure 5 and Figure 6 The first metal connecting segment 141 includes a first-level connecting segment 1411 and a second-level connecting segment 1412. The first-level connecting segment 1411 connects the second-level connecting segment 1412 and the edge portion 12. The second-level connecting segment 1412 is connected to the second metal connecting segment 142.

[0088] In particular, along the direction from the first-stage connecting segment 1411 to the second-stage connecting segment 1412, the thickness of the second-stage connecting segment 1412 gradually decreases.

[0089] It is understandable that the thickness of the second-stage connecting segment 1412 is set to gradually decrease, so that from the second-stage connecting segment 1412 to the connection between the second-stage connecting segment 1412 and the second metal connecting segment 142, the thickness of the connector 14 gradually decreases, which facilitates the forming of the first metal connecting segment 141 and the connector 14.

[0090] In some embodiments, see Figure 5 and Figure 6 The second metal connecting segment 142 includes a third secondary connecting segment 1421 and a fourth secondary connecting segment 1422. The third secondary connecting segment 1421 connects the fourth secondary connecting segment 1422 and the center portion 13. The fourth secondary connecting segment 1422 connects to the first metal connecting segment 141.

[0091] In particular, along the direction from the third-level connecting segment 1421 to the fourth-level connecting segment 1422, the thickness of the fourth-level connecting segment 1422 gradually decreases.

[0092] It is understandable that the thickness of the fourth secondary connecting segment 1422 is set to gradually decrease, so that from the fourth secondary connecting segment 1422 to the connection between the fourth secondary connecting segment 1422 and the first metal connecting segment 141, the thickness of the connector 14 gradually decreases, which facilitates the forming of the second metal connecting segment 142 and the connector 14.

[0093] In some embodiments, there are multiple connectors 14, which are evenly arranged around the central portion 13.

[0094] Understandably, the multiple connectors 14 are evenly arranged around the central portion 13, ensuring that the force exerted on the central portion 13 by the connectors 14 is uniform. In other words, the force exerted by the central portion 13 on each connector 14 is the same. Furthermore, in the early stages of battery thermal runaway, the gas generated by the runaway acts on the central portion 13, which then transmits the force to each connector 14. This results in the same deformation amplitude at the thinned portion of each connector 14, ensuring the uniformity of the central portion 13's protrusion, thus guaranteeing that the central portion 13 can be pulled up evenly.

[0095] In some embodiments, see Figure 5 and Figure 6 The distance between the end of the first metal connecting segment 141 facing away from the connection and the connection is L1, and the distance between the end of the second metal connecting segment 142 facing away from the connection and the connection is L2.

[0096] Specifically, L1 is less than L2, so that the length of the connector 14 between the central part 13 and the connection point will be greater than the length of the remaining connector 14, in order to ensure the bulge height of the central part 13 in the early stage of battery thermal runaway.

[0097] It is understandable that if the length of the connector 14 between the central part 13 and the connection point is too short, the height of the central part 13 that can be raised will be limited in the early stage of battery thermal runaway, and the central part 13 will have difficulty effectively pulling the distance between itself and the battery core.

[0098] Specifically, the ratio of L1 to L2 is between 0.2 and 1.

[0099] Understandably, if the ratio of L1 to L2 is less than 0.2, the length of the connector 14 between the central part 13 and the connection point is too long, and the protrusion height of the central part 13 is too high. This could lead to the central part 13 breaking off the connector 14 in the early stages of thermal runaway. Conversely, if the ratio of L1 to L2 is greater than 1, the length of the connector 14 between the central part 13 and the connection point is too short, limiting the protrusion height of the central part 13 and making it difficult for the central part 13 to effectively separate itself from the battery core. Therefore, this application sets the ratio of L1 to L2 between 0.2 and 1.

[0100] In some embodiments, the maximum thickness of the connector 14 is between 0.1 mm and 3 mm, that is, the thickness of the connector 14 without reduction is between 0.1 mm and 3 mm.

[0101] It is understandable that if the maximum thickness of the connector 14 is less than 0.1 mm, the strength of the connector 14 will be insufficient; if the maximum thickness of the connector 14 is greater than 3 mm, the connector 14 may have a significant impact on the size of the manifold. Therefore, this application sets the maximum thickness of the connector 14 between 0.1 mm and 3 mm.

[0102] In some embodiments, the ratio of the thickness at the connection to the maximum thickness of the connector 14 is less than or equal to 0.7.

[0103] Understandably, reducing the thickness of the joint to less than or equal to 0.7 times the original thickness ensures the effectiveness of the thickness reduction at the joint.

[0104] In some embodiments, the central portion 13 protrudes from the folding member 2.

[0105] Understandably, after the current collector is installed on the battery, since the central part 13 protrudes from the folded part, an air chamber space can be formed between the current collector and the battery wall. The air chamber space can be used to accommodate the gas generated when the battery is working normally, so as to avoid excessive gas pressure inside the battery due to the gas generated during normal operation.

[0106] In some embodiments, the first end of the second metal connecting segment 142 is connected to the first metal connecting segment 141, the second end of the second metal connecting segment 142 is connected to the center portion 13, and the second end of the second metal connecting segment 142 protrudes away from the first metal connecting segment 141 relative to the first end of the second metal connecting segment 142.

[0107] It is understandable that when the central part 13 is subjected to gas, it will bulge in the direction away from the battery core. The second end of the second metal connecting section 142 is connected to the central part, and the second end of the second metal connecting section 142 will bulge in the direction away from the first metal connecting section 141 under the pull of the central part 13.

[0108] It is understandable that during battery molding, the second end of the second metal connecting segment 142 can be configured to protrude in a direction away from the first metal connecting segment 141, so that the center portion 13 protrudes in a direction away from the first metal connecting segment 141, increasing the distance between the center portion 13 and the battery core. A space is formed between the center portion 13 and the battery core to accommodate the gas generated during normal battery operation, thus preventing the center portion 13 from deforming or displacing due to the gas generated during normal battery operation.

[0109] According to an embodiment of the second aspect of this application, the battery includes a casing, a winding core, and the aforementioned current collector. The casing has a mounting cavity, and both the winding core and the current collector are disposed within the mounting cavity. The current collector is connected to the winding core.

[0110] According to the battery of the present application embodiment, by setting a portion of the thickness of the connecting portion 22 to be less than the thickness of other portions of the connecting portion 22, that is, by thinning the thickness of a portion of the connecting portion 22, the portion of the connecting portion 22 after the thickness is reduced is more likely to be bent, thereby making the folding member 2 more likely to be folded, ensuring the folding angle of the folding member 2, improving the unfolding effect of the current collector, and enabling the internal pressure and gas of the battery to be effectively released when thermal runaway occurs.

[0111] By setting the thickness of at least part of the connecting portion 22 to be less than the thickness of the current collector body 1, that is, by thinning the thickness of at least part of the connecting portion 22, the connecting portion 22 is easier to bend after the thickness is reduced, which reduces the difficulty of folding the current collector 21 relative to the connecting portion 22, thereby making it easier for the folding part 2 to fold, ensuring the folding angle of the folding part 2, improving the unfolding effect of the current collector, and enabling the internal pressure and gas of the battery to be effectively released when thermal runaway occurs.

[0112] By setting the thickness of at least part of the connecting portion 22 to be less than the thickness of the current collector 21, that is, by thinning the thickness of at least part of the connecting portion 22, the connecting portion 22 is easier to bend after the thickness is reduced, which reduces the difficulty of folding the current collector 21 relative to the connecting portion 22, thereby making it easier for the folding member 2 to fold, ensuring the folding angle of the folding member 2, improving the unfolding effect of the current collector, and enabling the internal pressure and gas of the battery to be effectively released when thermal runaway occurs.

[0113] In some embodiments, see Figure 1 and Figure 2 The collector plate body 1 includes an edge portion 12, a center portion 13 and a connector 14. The connector 14 connects the edge portion 12 and the center portion 13. The center portion 13 has an injection hole 131.

[0114] Understandably, by forming a liquid injection hole 131 in the center part 13, liquid can be injected into the core through the liquid injection hole 131, which is simple and convenient.

[0115] Specifically, the ratio of the area of ​​the injection hole 131 to the cross-sectional area of ​​the core is less than 0.2, so as to avoid the injection hole 131 being too large and affecting the structural strength of the manifold.

[0116] In some embodiments, see Figure 1 and Figure 2 The diameter of the injection hole 131 is D1, the diameter of the center part 13 is D2, the battery capacity is M, the battery fast charging capability is N, and the current carrying capacity of the current collector is I. Among them, 1 / 4πD22 -1 / 4πD12>MN / I, in order to prevent excessive temperature rise and ensure the safety of the battery.

[0117] In some examples, the diameter D1 of the injection hole 131 is in mm, the diameter D2 of the center part 13 is in mm, the battery capacity M is in Ah, the battery fast charging capability N is in C, and the current carrying capacity I of the current collector is in A / mm.

[0118] According to an embodiment of the third aspect of this application, the electrical device includes the battery described above.

[0119] According to the embodiments of this application, the electrical equipment has a partially thinned connecting portion 22, which is thinner than the thickness of other portions of the connecting portion 22. This thinned portion of the connecting portion 22 is more prone to bending, which in turn makes the folding member 2 easier to fold. This ensures the folding angle of the folding member 2, improves the unfolding effect of the current collector, and allows the internal pressure and gas of the battery to be effectively released when thermal runaway occurs, thereby improving the safety of the electrical equipment.

[0120] By setting the thickness of at least part of the connecting portion 22 to be less than the thickness of the current collector body 1, that is, by thinning the thickness of at least part of the connecting portion 22, the connecting portion 22 is easier to bend after the thickness is reduced, which reduces the difficulty of folding the current collector 21 relative to the connecting portion 22, thereby making it easier for the folding part 2 to fold, ensuring the folding angle of the folding part 2, improving the unfolding effect of the current collector, and enabling the internal pressure and gas of the battery to be effectively released when thermal runaway occurs, thereby improving the safety of the electrical equipment.

[0121] By setting the thickness of at least part of the connecting portion 22 to be less than the thickness of the current collector 21, that is, by thinning the thickness of at least part of the connecting portion 22, the connecting portion 22 is easier to bend after the thickness is reduced, which reduces the difficulty of folding the current collector 21 relative to the connecting portion 22, thereby making it easier for the folding member 2 to fold, ensuring the folding angle of the folding member 2, improving the unfolding effect of the current collector, and enabling the internal pressure and gas of the battery to be effectively released when thermal runaway occurs, thereby improving the safety of the electrical equipment.

[0122] It should be noted that electrical equipment can be vehicles, energy storage power sources, consumer electronics, medical devices, smart cities, aircraft, or household appliances. It is important to note that the above are merely illustrative examples of electrical equipment and do not impose any specific limitations on the types of equipment used.

[0123] The embodiments of this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A collector disk, characterized in that, include: The collector plate body has through holes; A folding component is provided at the through hole. The folding component includes a current collecting part and a connecting part, and the connecting part connects the current collecting part and the current collecting disk body. Wherein, a portion of the thickness of the connecting part is less than the thickness of other portions of the connecting part, and / or, at least a portion of the thickness of the connecting part is less than the thickness of the collector plate body, and / or, at least a portion of the thickness of the connecting part is less than the thickness of the collector part.

2. The collector disk according to claim 1, characterized in that, The connecting part includes a first metal connecting part and a second metal connecting part. The first metal connecting part connects the second metal connecting part and the collector plate body. The second metal connecting part connects to the collector part. The connection between the first metal connecting part and the second metal connecting part is located at the position where the thickness of the connecting part is the smallest.

3. The collector disk according to claim 2, characterized in that, The first metal connection includes a first-stage connection and a second-stage connection. The first-stage connection connects the second-stage connection and the collector plate body, and the second-stage connection is connected to the second metal connection. The thickness of the second-level connection gradually decreases along the direction from the first-level connection to the second-level connection.

4. The collector disk according to claim 2, characterized in that, The second metal connection includes a third secondary connection and a fourth secondary connection. The third secondary connection connects the fourth secondary connection and the current collector, and the fourth secondary connection is connected to the first metal connection. In particular, along the direction from the third secondary connection portion to the fourth secondary connection portion, the thickness of the fourth secondary connection portion gradually decreases.

5. The collector disk according to any one of claims 1 to 4, characterized in that, The number of the through holes and the number of the folding parts are both multiple, and the multiple through holes and the multiple folding parts correspond one-to-one.

6. The collector disk according to claim 5, characterized in that, The collector plate body includes an edge portion, a center portion, and a connector. The connector connects the edge portion and the center portion, and a plurality of folding members are arranged around the center portion.

7. The collector disk according to claim 6, characterized in that, Multiple folding members are connected to the edge portion; and / or multiple folding members are connected to the center portion; and / or different folding members are connected to different connectors.

8. The collector disk according to claim 6, characterized in that, The thickness of a portion of the connector is less than the thickness of the other portions of the connector.

9. The collector disk according to claim 8, characterized in that, The connector includes a first metal connecting segment and a second metal connecting segment. The first metal connecting segment connects the second metal connecting segment and the edge portion. The second metal connecting segment connects to the center portion. The connection point between the first metal connecting segment and the second metal connecting segment is located at the position where the thickness of the connector is the minimum.

10. The collector disk according to claim 9, characterized in that, The first metal connecting segment includes a first-level connecting segment and a second-level connecting segment. The first-level connecting segment connects the second-level connecting segment and the edge portion. The second-level connecting segment is connected to the second metal connecting segment. The thickness of the second-level connecting segment gradually decreases along the direction from the first-level connecting segment to the second-level connecting segment.

11. The collector disk according to claim 9, characterized in that, The second metal connecting segment includes a third secondary connecting segment and a fourth secondary connecting segment. The third secondary connecting segment connects the fourth secondary connecting segment and the central portion, and the fourth secondary connecting segment connects to the first metal connecting segment. In particular, along the direction from the third-level connecting segment to the fourth-level connecting segment, the thickness of the fourth-level connecting segment gradually decreases.

12. The collector disk according to claim 9, characterized in that, The number of connectors is multiple, and the multiple connectors are evenly arranged around the central part.

13. The collector disk according to claim 9, characterized in that, The distance between the end of the first metal connecting segment facing away from the connection and the connection is L1, and the distance between the end of the second metal connecting segment facing away from the connection and the connection is L2, wherein... L1 is less than L2; or, The ratio of L1 to L2 is between 0.2 and 1.

14. The collector disk according to claim 9, characterized in that, The maximum thickness of the connector is between 0.1 mm and 3 mm; and / or, the ratio of the thickness of the connection to the maximum thickness of the connector is less than or equal to 0.

7.

15. The collector disk according to claim 6, characterized in that, The central portion protrudes from the folding member.

16. The collector disk according to claim 9, characterized in that, The first end of the second metal connecting segment is connected to the first metal connecting segment, the second end of the second metal connecting segment is connected to the center portion, and the second end of the second metal connecting segment protrudes away from the first metal connecting segment relative to the first end of the second metal connecting segment.

17. A battery, characterized in that, The device includes a housing, a core, and a collector plate as described in any one of claims 1 to 16, wherein the housing has a mounting cavity, the core and the collector plate are both disposed within the mounting cavity, and the collector plate is connected to the core.

18. The battery according to claim 17, characterized in that, The manifold body includes an edge portion, a center portion, and a connector. The connector connects the edge portion and the center portion, and the center portion has an injection hole.

19. The battery according to claim 18, characterized in that, The ratio of the area of ​​the injection hole to the cross-sectional area of ​​the core is less than 0.

2.

20. The battery according to claim 19, characterized in that, The diameter of the injection hole is D1, the diameter of the center is D2, the capacity of the battery is M, the fast charging capability of the battery is N, and the current carrying capacity of the current collector is I, wherein 1 / 4πD22-1 / 4πD12>MN / I.

21. An electrical appliance, characterized in that, Includes the battery as described in any one of claims 17 to 20.

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